Steel in construction. Convenient rules, formulæ and tables for the strength of steel shapes used as beams, struts, shafts, etc., made by the Pencoyd iron works, A. & P. Roberts company, Philadelphia ..
Steel in construction. Convenient rules, formulæ and tables for the strength of steel shapes used as beams, struts, shafts, etc., made by the Pencoyd iron works, A. & P. Roberts company, Philadelphia ..